External electron donor composition, catalyst composition for preparing special material for CPP (casting polypropylene) aluminum laminated film core layer and application

The invention provides an external electron donor composition, the external electron donor composition is composed of a first external electron donor and a second external electron donor, the first external electron donor is selected from at least one of compounds having a structure represented by a formula I, and the second external electron donor is selected from at least one of compounds having a structure represented by a formula II; the second external electron donor is selected from at least one of compounds with a structure as shown in a formula II; wherein R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are the same or different and are respectively and independently selected from H and C1-C5 straight chain or branched chain alkyl; and the molar ratio of the first external electron donor to the second external electron donor is (0.5-3.5): 1. The specific external electron donor composition is adopted, the relative molecular mass of the product is controlled by changing the dosage of the two external electr